DURABLE AND SAFEOur resistance bands are made of natural latex, they are non-irritating and harmless to skin, safe for all level users, due to quality raw material, they are very durable and flexible that can withstand extreme force, give you a big hand when doing intense workouts. Our resistance band can last for years, help you save money from buying others poor band. VARIOUS LEVELS FOR YOU TO CHOOSEWe have various levels of bands for you to chooseyellow ( 5-15 lbs ), red (15-35 lbs), black ( 25-65 lbs ), purple ( 35-85 lbs ), green ( 55-125 lbs ), as a female beginner we suggest you start from yellow, as a male beginner we suggest you start from black, with various levels, our resistance bands will company with you from beginner to expert. FOR MULTIPLE USAGESResistance bands are ideal for over 100 kinds of exercises such as strength training, stretching, pull-ups, powerlifting, also they are available in physical therapy, warm-ups, sculpting body lines, calorie burni